The VAC-V1 Gas Permeability Measurement Device is designed based on the differential pressure method. It is mainly used for gas transmission rate, solubility coefficient, diffusion coefficient, and permeability coefficient of plastic films, sheeting, and foils. This unit is developed with compliance to ISO 15105-1, ISO 2556, ASTM D1434, and JIS K7126-1 directive requirements. It can withstand a maximum working temperature of 50 °C. In addition, the framework is equipped with +/-0.1°C accuracy, and -0.1 MPa to +0.1 MPa testing pressure.